gcc/testsuite/gcc.dg/Wcomplain-wrong-lang-5.c

/* { dg-options {-Wcomplain-wrong-lang -Wctad-maybe-unsupported -Wno-complain-wrong-lang} }
   { dg-bogus {command-line option '-Wctad-maybe-unsupported' is valid for C\+\+/ObjC\+\+ but not for C} {} { target *-*-* } 0 } */